Inline Fiberglass

Inline Fiberglass was founded over 25 years ago by a team of dedicated engineers and technicians whose research led to the commercialization of proprietary technology and equipment used to pultrude thin walled lineals in virtually any shape that is consistent over the length of the profile.

Fiberglass is a natural insulator because it does not conduct heat and cold, and it doesn't expand or contract. Most window and door frame components have an interface of different materials: glass on wood, glass on aluminum or glass on vinyl. With fiberglass, the components are identical which means there is minimal expansion and contraction and if there is any, the components expand and contract as a unit.